Shimozawa A
Anat Anz. 1982;151(3):286-96.
A nerve fiber caliber analysis was performed by electron microscope on 6 intermediate nerves from 5 mice. Majority (86.5%) of the myelin sheaths of the myelinated fibers in the intermediate nerves ranged from 1 to 2 micrometers in minor diameter, and majority (85.7%) of their axons ranged from 0.4 to 1.2 micrometers in minor diameter. The intermediate nerves contained small myelinated fibers at much higher percentage than the large fiber zone of the motor roots of the facial nerves, while it did not show significant difference from the small fiber zone of the motor roots. However, frequency distribution of myelin sheaths of the myelinated fibers of the intermediate nerves may tend to be a little larger than that of the small fiber zone of the motor roots, while frequency distribution of their axons may incline to the more or less smaller than that of the small fiber zone of the motor roots. Majority (72.4%) of the unmyelinated fibers in the intermediate nerves ranged from 0.3 to 0.7 micrometers in minor diameter. Unmyelinated fibers of the intermediate nerves showed similar pattern of diameter frequency distribution with that of the motor roots of the facial nerves and the deep petrosal nerves. The diameter frequency distribution of the myelin sheaths, the axons of the myelinated fibers and the unmyelinated fibers in the intermediate nerves were constantly unimodal.
对来自5只小鼠的6条中间神经进行了电子显微镜下的神经纤维直径分析。中间神经中髓鞘纤维的髓鞘大部分（86.5%）小直径范围为1至2微米，其轴突大部分（85.7%）小直径范围为0.4至1.2微米。中间神经中含有的小髓鞘纤维百分比远高于面神经运动根的大纤维区，而与运动根的小纤维区无显著差异。然而，中间神经髓鞘纤维的髓鞘频率分布可能略大于运动根小纤维区，而其轴突的频率分布可能或多或少小于运动根小纤维区。中间神经中大部分（72.4%）无髓鞘纤维小直径范围为0.3至0.7微米。中间神经的无髓鞘纤维与面神经运动根和岩深神经的直径频率分布模式相似。中间神经中髓鞘、有髓鞘纤维的轴突和无髓鞘纤维的直径频率分布均呈单峰。
